<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区 -->
      <div class="avatar_box">
        <img src="../assets/logo.png"
             alt="">
      </div>
      <!-- 登陆表单区 -->
      <el-form ref="loginFormRef"
               :model="loginForm"
               class="login_form"
               label-width="60px"
               :rules="loginFormRules">
        <el-form-item label="账号"
                      prop="username">
          <el-input v-model="loginForm.username"
                    prefix-icon="el-icon-user"></el-input>
        </el-form-item>
        <el-form-item label="密码"
                      prop="password">
          <el-input type="password"
                    v-model="loginForm.password"
                    prefix-icon="el-icon-unlock"></el-input>
        </el-form-item>
        <el-form-item class="btns">
          <el-button type="primary"
                     @click="login">登录</el-button>
          <el-button @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>
<script>
export default {
  data () {
    return {
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      loginFormRules: {
        // 验证用户名是否合法
        username: [
          { required: true, message: '请输入登录名称', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 5 个字符', trigger: 'blur' }
        ],
        // 验证密码是否合法
        password: [
          { required: true, message: '请输入登录密码', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 5 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    // 重置表单事件
    resetLoginForm () {
      this.$refs.loginFormRef.resetFields()
      this.loginForm.username = ''
      this.loginForm.password = ''
    },
    login () {
      // 表单登陆之前的的预验证
      this.$refs.loginFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post('login', this.loginForm)
        if (res.meta.status !== 200) { return this.$message.error('登陆失败') }
        this.$message.success('登陆成功')
        console.log(res)
        window.sessionStorage.setItem('token', res.data.token)
        this.$router.push('/home')
      })
    }
  }
}
</script>

<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}
.login_box {
  width: 450px;
  height: 300px;
  background: #ffff;
  border-radius: 4px;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}
.avatar_box {
  height: 100px;
  width: 100px;
  border: 10px soild rgb(173, 173, 173);
  border-radius: 50%;
  padding: 5px;
  background-color: rgb(255, 255, 255);
  position: absolute;
  left: 50%;
  transform: translate(-50%, -50%);
  img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background-color: rgb(202, 202, 202);
  }
}
.btns {
  display: flex;
  justify-content: flex-end;
}
</style>
